Acute splenic sequestration happens when sickled red blood cells get trapped in the spleen, causing the spleen to enlarge. Sickle cell disease affects the red blood cells causing them to sickle or become banana-shaped. The main purpose of red blood cells (RBCs) is to deliver oxygen to the body.

What causes splenic sequestration?

Splenic sequestration happens when a lot of sickled red blood cells become trapped in the spleen. The spleen can enlarge, get damaged, and not work as it should. When the spleen doesn't work well, a person is more likely to have serious, life-threatening infections with certain types of bacteria.

When does splenic sequestration occur?

Splenic sequestration occurs with highest frequency during the first 5 years of life in children with sickle cell anemia. Splenic sequestration can occur at any age in individuals with other sickle syndromes.